Preheat oven to 350 degrees.
In a large, deep oven safe frying pan (big enough to hold chicken and vegetables or two oven safe pans if you need), sauté the onion in about 2 tbsp olive oil over medium high heat for about 1 minute.
Add the collard greens and sauté for about 3 minutes until they start to decrease in size. Make sure to continuously move around the pan so the onions and greens don't begin go burn.
Once the collard greens are manageable, place over to one side of the pan and sauté the potatoes for 3 minutes to brown them.
Place the chicken skin side down or breasts in the pan and let brown for about 2 minutes, and then flip and let brown for an additional 2 minutes. Save marinade for next step.
Distribute the collard greens so they are at the bottom of everything and throughout the pan. You are going to want them to be submerged in the liquid, so place the chicken and potatoes on top of them. Add the marinade, cup of white wine, cup of chicken broth and salt to pan and make sure all greens are submerged.
Let the liquid come to a simmer.
Place in the oven for about 45 minutes (35 minutes for breasts) .
If using thighs and legs: Broil the chicken and potatoes (potatoes and chicken should be above liquid so they can get crispy- you may have to remove some liquid from pan while the greens should still be submerged in liquid so they don't burn) for about 4-6 minutes to get them crispy. Chicken may crisp sooner than potatoes, so be prepared to take out chicken first so it doesn't burn
If using breasts: Broil the chicken and potatoes (greens still submerged so they don't burn). The chicken should be broiled for 2 minutes, then removed from pan. Replace the potatoes (above liquid so they can get crispy- you may have to remove some liquid from pan) in the oven and broil for an additional 4-6 minutes to get them crispy.
Serve it with the sauce from the pan.